The isometric push-up and pull-down strength profiles of male and female paraplegics were determined in the normal, maximum, and extreme workspace reach envelopes. For this investigation, a computerized isometric strength measurement system was designed and constructed. Three vertical angles (Φ = −20°, 0°, 45°) and three horizontal angles (θ = 45°, 90°, 135°) were used to define the 24 measurement locations in the workspace reach envelope. The maximum push-up strength for men was 137 newtons (N) at Φ = 0° and θ = 135° and for the females 66 N at Φ = 0° and θ = 90°, both in the normal reach envelope. The maximum pull-down strength for both men and women occurred at Φ = 45° and θ = 130° in the normal reach envelope and were 151 and 80 N, respectively. Overall, women were 61% as strong as men. For both sexes, pull-down strength was noticeably higher than push-up strength. On the average, push-up strength was 64% of pull-down strength.